This page explains how to migrate the headless from Mono to .NET 8.
No configuration changes are needed.
As the .NET 8 Headless is in testing, you will find it in the net8.0 folder when downloading the Headless. This will change in the future, when the current Headless software is replaced by the .NET 8 one.
Baremetal
Before anything, make sure the .NET 8 runtime is installed.
You can then either start the headless by double-clicking on Resonite.exe (Windows only) or using the command dotnet Resonite.dll. This applies to scripts as well that needs to be modified.
Docker
You will need to switch to a .NET 8 base image, for instance mcr.microsoft.com/dotnet/runtime:8.0.
Then modify your CMD instruction to execute dotnet Resonite.dll.